Thigh exercise device



FIG. 1 is a perspective view of a thigh exercise device showing my new design;

FIG. 2 is an opposite perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines illustrate portions of the thigh exercise device which form no part of the claimed design. 

The ornamental design for a thigh exercise device, as shown. 